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| a white, crystalline, water-insoluble solid, C14H9Cl5, usually derived from chloral by reaction with chlorobenzene in the presence of fuming sulfuric acid: used as an insecticide and as a scabicide and pediculicide: agricultural use prohibited in the U.S. |
| the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language). |
avitaminosis a·vi·ta·min·o·sis (ā-vī'tə-mĭ-nō'sĭs)
n.
A disease, such as scurvy, beriberi, or pellagra, caused by deficiency of one or more essential vitamins.